On the Trail of the Fox

The story is about the crew who came over all Europe to get the lifestyle of the fox and try to get in touch with one of them in order to act in the movie “The fox and the child” (Luc Jacquet). A fascinating story between men and wild animals. Is it possible that a fox, a wild and untrustworthy animal, could become such a friend to man that it could actually be the protagonist of a film?